Knitting-machine.



No. 665,130. I Patented Ian. I, mm. H. G. RAPP & .I. III. WEBER.

KNITTING MACHINE.

(Application filed July 12, 1599.) (No Nodal.) 4 Shaats- ShoeI'I.

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No. 665,!30. Q Patbntad Jan. I, mm. H. c. RAPP.& J. IMQWEBER. KNITTING MACHINE (Application filed July 12, 1999.)

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No. 665,80. Patented Jan. I, I90l.

H. (2. BAP? &. J. M. WEBER.

KNITTING MACHINE.

' (Application filed July 12, 1899.) (No Model.) 4 Sheata--Sheet 3.

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'No. 665,I3I0."

H. c. RAPP & J. III. WEBER.

Patented Ian. I, I90I.

KNITTING MACHINE.

(Application filed July 12, 1899.)

'4 SheaIs-Sheet 4 (No Model.)

IIIIIIIIII W/ TNE SSE S A TTOHNE 1': NORRIS PEIERS co. FHUTO-LITNO WASHINGTON, no.

UNITED STATES.

PATENT OFFIcE.

HARRY O. RAPP AND JACOB M. WEBER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO THE BRANSON MACHINE COMPANY, OF SAME PLACE.

KNITTING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 665,130, dated January 1, 1901.

Application filed July 12, 1899. strain). 723.583. on) model.)

To all whom it may-concern..-

Be it known that We, HARRY O. RAPP and JACOB -M. WEBER, citizens of the United States, residing in the cityand county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Knitting-Machines, of which the following is a full, clear, and exact description, reference being had to the accon1- panying drawings, of which Figure 1, Sheet 1, is a side elevation of a circular-knitting machine broken away and showing our invention applied thereto. Fig. 2, Sheet 2, is a full section, as on line 2 2, Fig. 1. Fig. 3 is a side elevation (showing the upper portion of the cam-cylinderin section) of the yarn-breaking devices. Fig. 4, Sheet 3, is a plan view of parts of the device shown in Fig. 1. Fig. 5 is a similar view to Fig. 1, but showing the position of the yarn-carriers, yarn-breaker, &c., and the yarn when the latter is about to be severed by the action of the yarn-breaking devices. Fig. 6 is a detail, enlarged, being a detached view of the camhead for throwing the yarn-carriers into and out of active position. Fig. 7 is a perspective view of one of the yarn-carriers detached and showing the means for adjusting it upon its supporting-bar. Fig. 8 is a section, as on line 8 8, Fig. 7. Fig. 9 is a horizontal section, as on line 9 9, Fig. 1. Fig. 10 is a similar section, as on line 10 10, Fig. 1. Fig. 11 is a view showing the mechanism for operating the pattern cam-wheel, which is shown partially in full lines and partially by dotted lines in Fig. 1. Fig. 12 is an elevation of the mechanism which operates the yarn-breaker. Fig. 13 is a diagrammatic view looking from the interior of the needle-cylinder and showing the relative positions of the yarn-carriers and needles when one of the yarn-carriers is feeding yarn to the latter (the one at the left in the figure) and the other is in the raised or non-feeding position.

The object of our invention is to automatically at predetermined times change the feed of a knitting-machine from a yarn of one character or color to another in a simple and etficient manner.

To this end the invention consists in combining with a knitting-machine of usual construction a certain mechanism to eifect the purpose above mentioned, all as hereinafter explained.

The leading feature of our invention comprises a set of two movable yarn-carriers by which the yarn is fed to the needles,'with mechanism for throwing one of the same into the operative positionthat is, so that the yarn will be in the path of the needle-hooks on their downward movement-and substantially at the same time throwing the other yarn-carrier out of the operative positionthat is, out of the range of the needlesand so on in alternation.

Another feature of the invention relates to mechanism for severing the yarn carried by the yarn-carrier that is thrown out of the operative position immediately after the latter is effected. I

Other features of the invention relate to certain combinations and details of the mechanisms for producing the results above mentioned, all of which will be hereinafter described and the novel features pointed out.

Referring to the accompanying drawings, 1 is the usual bed-plate of acircular-knitting machine of Well-known construction, to which our invention is applied, said bed-plate being supported upon uprights or standards 2.

3 is the needle-cylinder, equipped with the usual needles 4 and secured to the bed-plate.

5 is the cam-cylinder, surrounding the needie-cylinder and rotatably mounted upon the top of the bed-plate l. The lower edge of the cam-cylinder is provided with the customary gear-teeth 6, that are engaged by a bevel-gear 7 on the innerend of the drivingshaft 8, which latter is journaled in one of the standards 2, as seen, and is adapted to be driven from a suitable source of power.

We have not shown and do not deem it necessary to show and describe certain wellknown features of a knitting-machine of this class, which, although essential to the successful operation thereof, can be supplied by any mechanic familiar with knitting machines. For instance, the knitting-cams car ried by the cam-cylinder, as also other parts of well-known construction and operation, have been omitted from the drawings.

Secured to the outer periphery of the camcylinder is a block 9, in vertical guideways 10 of which are carried two bars, (marked 11 11, respectively,) that are adapted to be reciprocated longitudinally in said guideways, as hereinafter described. Mounted upon the upper end of each of these bars, respectively, is an inwardly-projecting block 12 12, respectively having holes 13 therethrough for the passage of the yarn. The bars 11 11, with the perforated blocks 12 12, will hereinafter be termed the yarn-carriers. The inner surfaces of said blocks are in such position and proximity to the top of the needle-cylinder that'when they are respectively brought into proper vertical position, as hereinafter described, the yarn passed through the hole 13 will be caught by the needle-hooks when the needles are depressed by the knitting-cams. Thus when one of the yarn-carriers is drawn downwardly into such position that the end of the hole 13 adjacent to the needles is below the level of the needle-hooks when at their point of highest elevation in knitting the said hooks will overhang the yarn and it will be drawn from the said yarn-carrier as the needles are lowered by the knitting-cams, and when it is desired to throw in one yarncarrier for another as, for example, in changing colors in making striped goods-the yarncarrier is elevated to a position in which the yarn issuing from the hole 13 is out of the reach of the needle-hooks and the other yarncarrier is lowered into position to feed its yarn to the needles.

The mechanism for automaticallythrowing one of the yarncarriers into operation and the other out of operation at proper predetermined times is as follows: Each of the bars 11 11 is acted upon by a spring-one for each bar-(marked 14) that tends to press the bar upwardly. This spring is secured to the block 9 by a screw-pin l5, and its free end bears against the under side of a stud 16, that projects from the lower end of the said bars 11 11". Each of the said bars is provided with a vertical slot 17 17, respectively, (indicated by dotted lines in Fig. 1,) into which slots pro" ject pins or studs 18 18, extending inwardly from the respective arms of a lever 19, that is fulcrumed on a pin 20 of the block 9 and located between the bars 11 and 11", as seen in Fig. 1. On one end of this lever 19 is a projection 21, which is adapted to be engaged by a cam to throw it (the lever) either up or down, as required, and thus reverse the vertical positions of the yarn-carriers, as hereinafter described. On the upper side of the arms of the lever 19 are projections (marked 22 22, respectively) that are adapted to en gage studs 23 23, projecting from horizontal bars or bolts 24 24, which bolts are adapted to slide in longitudinal guideways 25 in the block 9. The bars 11 1l are provided on their inner opposite faces with notches 26 26, as seen in Figs. 1, 7, and 9. Aspring 27, one end of which is secured to the block 9 and the other or free end bears against a stud 28 on the outer end of bolt 24, tends to press the latter outwardly, so that when the bar 11 is lowered to such position that a lug or tooth 29, which projects outwardly from bolt 24, comes opposite the notch 26, it will engage the notch and will be maintained in such engagement by the stress of spring 27 until the bolt is withdrawn, as hereinafter described. Asimilar spring 27 acts in like manner upon bolt 24; to tend to maintain its tooth 29 in engagement with the notch 26 in the face of the bar 11.

In the drawings the bar 11, and consequently the block on its upper end, is in the depressed position, in which the needles are receiving the yarn therefrom, while the other bar 11 is elevated, so that its block is above the plane of the needles-that is, in the inoperative positionbecause the yarn carried by that block is beyond the range of the needles.

It will be obvious from the foregoing description that if the lever 19 be suitably vibrated on its fulcrum one of the yarn-carriers will be depressed and the other elevated-that is, one will be thrown from the operative or yarn-feeding to the inoperative or non-feeding position and the other from the inoperative or non'feeding to the operative or feeding position. For example, in the drawings the yarn-carrier 11. is in the depressed or yarn-feeding position and the yarncarrier 11 is in the elevated or non-feeding position, the end of the lever 19, upon which is the aforementioned lug or projection 21, being elevated. If now this end of the lever be pressed down, the following results take place: The stud 18 of that arm of the lever which is at the bottom of the slot 17 in the bar 11 is carried down, and thus depresses the said bar. At the same time the lug 22 will be moved back from the stud 23 on the horizontal bolt 24*, and the latter is carried back by the stress of its spring 2 until finally the projection or tooth 29 engages the notch 26 in the edge of the bar 11 and so locks the latter in its depressed position. While the said arm of the lever moves downwardly the other arm will of course move upwardly. In doing this, its lug 22 impinging against the stud 23 of the bolt 24, the latter will be drawn back against the stress of its spring 27, thereby disengaging the tooth 29 from the notch 26 in the bar 11. At the same time the stud 18 has moved to the upper end of the slot 17 of bar 11, and the spring 14 then forces up the latter. When the lever 19 is again elevated-that is, brought from the position just assumed to that shown in the drawings-the positions of the yarn-carriers, &c., will be reversed.

It will be observed in the construction shown in the drawings that there is a lost motion in the moving operation of the stud 18 upon the bar 11-that is to say, in the p0- sition of the lever 19 shown the said stud is at the bottom of the slot 17. Consequently til such time.

- the lever 19.

when the lever is depressed, as described, the then-elevated ya rn-carrier will be forced down at once, but the stud 18 will not reach the upper end of the slot 17 until after the bar 11 has been carried down and the tooth 29 will not be withdrawn from the notch 26 un- The same lost motion occurs when the lever is elevatedas when depressed, but is then between the stud 18 and its slot 17 and between the lug 22 and the stud 23 of the bolt 24. The purpose of having this lost motion is to insure for a short time the feeding of the yarn by both yarn-carriers, thus causing, so to say, a slight overlap of the two yarns and so guarding against the dropping of stitches, which would (owing to the rapid motion of the camcylinder upon which the yarn-carriers are mounted) be liable to occur were the yarn-carriers slid rapidly past each other int-he shifting operation.

The particular means which We have devised and employed for automatically and at the proper times actuating the lever 19 to effect the shifting of the yarn-carriers is as follows: At the upper end of a vertical rod 30, vertically slidable in a gnideway 31 of the stationary bed-plate 1 of the machine, is a head 32, having on its upper and lower sides, respectively, cam-surfaces or inclines 33 33*. These cam-surfaces are inthe same vertical plane as the aforementioned projection 21 of When the said rod 30is in one position-that is, the cam-head 32 is in one horizontal planethe lever 19 being then in the depressed position, the upper cam-surface 33 of the head will as the cam-cylinder rotates be impinged against by the lower side of the projection 21 of the lever, thus throwing up that end of the latter, where it remains, as in the drawings, until at a predetermined time the rod is thrown up to'a position in which the upper side of projection 21 in the next revolution of the camcylinder will impinge against the lower camsurface 33, and thus cause the depression of the lever, thereby again reversing the positions of the yarn-carriers.

Various means may be resorted to for effecting the reciprocations of the rod 30 at the desired times. We have therefore deemed it necessary to show but one mechanism for that purpose, which is as follows: The lower end of the rod 30 is pivotally attached to an arm 34 of a crank 34, that is pivoted on a stud 35, projecting from one of the standards 2 of the machine. On another arm 34 of said crank is a roller 36, which rides upon the periphery of a pattern or cam wheel 37, that is journaled on a stud or shaft 38, pro jecting from the standard of the machine. The periphery of the Wheel 37 is provided with an elevated portion 37 and a depressed portion 37*, so that when said wheel is rotated in the direction of the arrow in Fig. l the roller 36 will for a certain time ride upon the elevated portion and at another time upon the depressed portion. When the roller 36 rides upon the low portion 37", the rod 30 will be depressed, as in the drawings, by its own weight, or a suitable spring might be employed to the same end. When the said roller rides upon the elevated portion 37 of the wheel, the rod will be in the elevated position.-

The pattern-wheel is rotated automatically (in this case step by step) by suitable mechanism, as by that shown in the drawings,

which is as follows: The wheel is provided witha circular disk 38,- having peripheral ratchet-teeth 38 that are engaged by the free end of a pawl 38), whose other end is pivoted at 40 to an arm 41, whose lower end is pivoted to the standard of the machine, and its upper end is pivoted eccentrically to a wheel 43, carried on the end of a shaft 44. This shaft, which is journaled in bearings in the standards 2, is driven from the main drivingshaft 8 through the medium of a pinion thereon, whose teeth mesh with those of a gear 46 on the shaft 44. It will thus be seen that as the shaft 8 is rotated the shaft 44 will also be rotated, and hence through the described connections the pawl 39 will rotate the pattern-wheel step by step in the direction of the arrow in Fig. 1.

As it is desirable that the yarn-carrier blocks 12 12 shall be'adjustable both vertically and horizontally, we secure the same to the ends of the bars 11 11 in the following manner: The inner edge of the top of each of said bars is provided with projecting vertical guide-flanges 45, fitted to which is a bracket-arm 46, that is secured to the end of the bar by a screw-bolt 47, passing through a vertical slot 48 in the bar.

Fitted to a horizontal guideway 49 in the top of the bracket-arm 46 is a lug 50 of the perforated block- 12, (or 12 which lug is secured to the arm 46 by a vertical cap-screw 51, passing through a vertical slot 53 in the said arm 46. By loosening screw 47 the block 12 (or 12 may be adjusted vertically and the screw again tightened to lock the parts in position of vertical adjustment, and to effect in and out adjustments of the block 12 (or 12 the screw 51 is loosened, and after the yarncarrier block is adjusted to proper position the screw is again tightened.

As itis necessary when the yarn-carriers have been shifted and a new yarn is being fed to the needles that the yarn which was previously being fed in shall in some way be severed at the proper moment, we have devised a simple and efficient means for efiecting this result, which we will now proceed to describe.

Secured to the top of the cam-cylinder, or rather in this instance to the top of the block 9, is the horizontal arm 54 of an L-shaped bracket 54, to the vertical arm 54 of which is secured a vertical limb 55 of a U-shaped piece 55, which overhangs the needle-cylinder and whose other vertical limb 55 terminates in an iutnrned limb 56, whose free end is adjacent to the needles and a short distance above the top of the needle-cylinder. Pivoted on a pin 57, that is journaled in the upper bifurcated end of a post 58, rising from the cam-cylinder, is a lever 59, whose inner end is U-shaped, as seen, the free end of the inner vertical limb thereof 59 having secured to one side thereof a foot 60, which normally projects over the top of the limb 56 of the piece 55 and is held in contact with the said limb by a helical spring 61, which tends to draw down the inner or U-shaped end of said lever 59, the upper end of this spring being attached to the limb 59 and its lower end to the cam-cylinder. The cam-cylinder revolving and the needle-cylinder stationary, when one of the yarn-carriers is elevated out of the feeding position, as hereinbefore described, the yarn issuing from its hole 13 will be stretched from the last needle to which it was fed to the inner end of said hole 13 of said carrier, and in so doing will, owing to the stress of the yarn, be a chord-line ot' the interior of the needle-cylinder, as shown in Fig. 5. At the proper instant the inner end or foot 60 of lever 59 will be elevated by means hereinafter described,.and the yarn will be drawn across the opening between said footand the limb 56, whereupon the foot 60 will be depressed by the stress of spring 61 and grip the yarn between the said foot and the limb 56, and the yarn will as the camcylinder rotates break off at the weakest point between the said gripping-point and the last needle from which the yarn extends. The mechanism for thus actuating the lever 59 automatically and at the proper predetermined times with relation to the shifting of the yarn-carriers is as follows:

62, Figs. 1, 4, and 12, is a lever that is pivoted to a lug 63 of the bed-plate 1 of the machine. At the upper end of the upper limb 62 of this lever is a cam-head 64, which is normally held out of the path of the project ing outer arm 59 of the lever 59 by a spring 65, which draws against the lower limb 62 of lever 62, one end of this spring being secured to arm 62 and the other end to the bed-plate 1, as seen in Fig. 12. The inturned lower end of said arm 62 bears normally against the plane side surface of the pattern camwheel 37. On the face of the latter is a camlug 66, that projects beyon d the vertical plane occupied by the inturned end of the arm 62*, as seen in Figs. 1, 2, 5, and 12. At a certain time in the revolution of the pattern-wheel 37 the cam-lug 66 comes into contact with the arm 62, thus throwing the upper limb of lever 62, and consequently the cam-head 64, toward the needle-cylinder and into the path of the aforesaid arm 59 of the yarn-breaking device, whereby the foot 60 of lever 59 will be raised for a moment out of contact with the limb 56 of the piece 55, so that the yarn (of the carrier that has just been shifted out of operation) may enter the opening between the foot 60 and the limb 56. When the limb 59 of lever 59 passes out of contact with the cam-head 64, the spring 61 causes the foot 60 to descend and so grip the yarn. Before another revolution of the cam-cylinder can take place the cam-head 64: will be returned to the normal position that is, out of the path of the arm 59 by the action of spring 65 on lever 62, the cam-lug 66 having moved out of contact with the arm of said lever.

We have referred to but a single cam-lug on the wheel. There must be two of these lugs at proper distance apart, as seen in Fig. 1-that is, one corresponding to each shifting of the yarn-carriers. There may, however, be as many of the elevated and depressed portions of the periphery of the cam-wheelas may be desired, according to the frequency of shiftings of the yarn-carriers-wl. e., the changes of yarn-that may be required and also a corresponding number of cam-lugs 66.

We remark that the machine shown in the drawings is what we term a single-feed machine, there being but one yarn fed to the needles at one time. e have, however, caused to be made similar machines in which several of the yarn-carriers and the devices for shifting the same were used, whereby a corresponding number of yarns were fed in.

As will be observed, looking at Figs. 1 and 12, the cam-head 64 is V-shaped or approximately so, one of the inclines, the one to the left in the said figures, being the working face that causes the depression of the arm 59 of lever 59, as previously described. The other incline, to the right, has no other function than to allow the gradual action of the spring 61, so as to obviate a hammer-blow of the arm 59.

Provision is made for effecting both horizontal and vertical adjustments of the U- shaped piece 55, consisting of a cap-screw 67, passing through a slot 68 in the horizontal limb of the L-shaped bracket 5a into the block 9 for the first-mentioned adjustment, and a similar screw 69, passing through a slot 70in the vertical limb 55 of the U-shaped piece 55 and into the vertical limb 54; of the L- shaped bracket 54, for the last-mentioned adjustment.

While we have shown and described our yarn-changing devices as applied to a circular-knitting machine, the same may be employed by or adapted to straight-knitting machines by changes which the mechanic skilled in the art can readily make.

We do not wish to be understood as limiting ourselves to the precise construction shown and described herein, as any mechanic skilled in the manufacture and use of knitting-machines may readily change the same without departing from our invention.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. In a knitting-machine, the combination of the needle-cylinder, its needles, the camcylinder, the movable yarn-carriers carried by the cam-cylinder, and arranged with re- ITO lation to said needle-cylinder andthe needles I anism for automatically actuating said lever therein as shown, means for movinn' said yarncarriers alternately into and out of action with regard to the needles at predetermined times, and lost-motion connections between the said means and carriers whereby yarn is fed to the needles by both carriers for a short time, substantially as and for the purpose set forth.

2. In a knitting-machine, the combination of the stationary needle-cylinder, its needles, the cam-cylinder, the yarn-carriers mounted upon and adapted to slide in guideways of the cam-cylinder and arranged with relation to said needle-cylinder and-the needles therein as shown,and automatic mechanism provided with lost-motion connections between the carriers and adapted to act upon said yarn-carriers to throw one of the same int-o operative position with relation to the needles, and thereafter to throw the other yarn-carrier out of the operative position with relation to said needles and means for maintaining said carriers in such positions, substantially as set forth.

3. In a knitting-machine, the combination of the stationary needle-cylinder, its needles, the rotatable cam-cylinder, the contiguous reciprocatory yarn-carriers mounted on said cam-cylinder and arranged with relation to the needle-cylinder and the needles therein as shown, the pattern-wheel, or the like, and mechanism provided with lost-motion connections between said wheel and the said yarncarriers whereby the latter are caused to be" ed to actuate said lever at predetermined,

times, and thereby to shift said yarn-carriers alternately from the operative to the inoperative position with relation to the needles,substantially as set forth. I

5. In a knitting-machine, the combination of the needle-cylinder, the needles therein, the cam-cylinder, the contiguous reciprocatory spring-controlled ya rn-carriers provided with notches and slots and mounted on said cam-cylinder, the lever pivoted to said camcylinder provided with projections 22, and having studs engaging the respective slots of the yarn-carriers, the slidable spring-controlled bars, 24, having the studs or projections, 23, adapted to be engaged by projections, 22, respectively,of said lever, and mechat predetern'iined times, whereby said yarncarriers are shifted alternately from the operative to the inoperative position with relation to the needles, and are maintained in such positions, substantially as set forth.

6. In a knitting-machine, the combination of the needle-cylinder, needles, and cam-cyl inder, a series of yarn-carriers, springs tending to move said carriersinto inoperative positions, catches for holding them in operative position, means for moving the carriers alternately into operative position and devices actuated by said means to trip the catches.

7. In a knittingunachine, the combination of the needle-cylinder, needles, and cam-cylinder,contignous yarn-carriers mounted upon said cam cylinder, means for alternately moving the carriers into and out of operative position, catches for holding them in opera- 'tive position and devices intermediate said means and catches whereby as the former moves one carrier into operative position it releases the other from its catch,

8. In a knitting-machine, the combination of the stationary needle-cylinder, the rotatable cam-cylind er, its needles, the reciprocatory yarn-carriers mounted thereon and provided With elongated slots, the two-arm rocklever pivoted on said cam-cylinder and provided with studs, means for rocking said lever at predetermined times, the studs on the arms of said lever being engaged with the elongated slots in the said yarn-carriers respectively,whereby when said lever is rocked on its pivot one of said yarn-carriers is shifted out of the operative position, and the other yarn-carrier into the operative position, and whereby also the yarns carried by the respective yarn-carriers are caused to momentarily be overlapped and simultaneously fed to the needles, substantially as and for the purpose set forth.

9. In a knitting-machine, the combination of the stationary needle-cylinder, its needles, the rotatable cain-cylinder, the reciprocatory yarn carriers mounted thereon, means for moving, at predetermined times, one of said yarn-carriers out of operative position, and the other, substantially at the same time, into operative position, and mechanism for cansing the breaking of the yarn carried by the yarn-carrier that has been brought out of operative position, said means consisting of the yarn-gripping device composed of the piece, 55, having the outturned limb, 56, and arranged with relation to the yarn-carriers, the

times, to cause the foot, 60, to be elevated out of contact with the said limb, substantially as and for the purpose set forth.

10. In a knitting-machine, the combination of the stationary needle-cylinder, its needles, the cam-cylinder, the reciprocatory springoontrolled yarn-carriers mounted thereon, the two-arm rock-lever pivoted to the cam-cylinder and having its arms connected to the said yarn-carriers respectively, and having also the projection, 21, the cam-head having the cam-surfaces, 33, 33, the reciprocatory rod on which said cam-head is 111011 nted,the cranklever, 34:, having its free end connected to said rod, the rotatable pattern-wheel having the peripheral high and low portions, and the roller carried by said crank-arm, and adapted to ride upon the peripheral part of said pattern-whee1,all arranged,combined and adapted to operate substantially as and for the purpose set forth.

11. In a knitting-machine, the combination of the stationary needle-cylinder, its needles, the rotatable cam-cylinder, the reciprocatory yarn-carriers mounted thereon, the piece, 55, carried by the cam-cylinder and having the outturned limb, 56, the pivoted lever, 59, also carried by the cam-cylinder, and having the outwardly-projecting arm, 59*, and the foot, 60, the spring adapted to normally maintain the said foot in contact with said limb, the relatively-fixed cam, 64, togetherwith means for throwing said cam into and out of the path of movement of the said arm, 59, at predctermined times, substantially as and for the purpose set forth.

12. In a knitting-machine, the combination of the needle-cylinder, its needles, the camcylinder, the reciprocatory yarn carriers mounted thereon, the two-arm rock-lever pivoted to the cam-cylinder, and having its arms connected to said yarn-carriers respectively, means for actuating said lever at predetermined times to throw one of said yarlrcarriers out of the operative position, and substantially simultaneously, the other yarn-carrier into operative position, the spring-controlled bolts, 24, 24 having studs, the lugs, 22, 22", on the said lever, adapted to engage the studs upon said bolts, as described, whereby when said lever is rocked one of said bolts will at a predetermined time engage a notch in one of the yarn-carriers, and the other bolt, substantially at the same time, be released from a similar notch in the other yarn-carrier, as and for the purpose set forth.

In testimony whereof we have hereunto atfixed our signatures this 20th day of June, A. D.i1899.

HARRY C. RAPP. JACOB M. WEBER. Vitnesses:

SAML. B. T. HOWELL, WALTER G. PUSEY. 

